<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>SessionStorage</title>
</head>
<body>
    <h2>SessionStorage</h2>
    <button onclick="saveData()">点我保存一些数据</button>
    <button onclick="readData()">点我读取一些数据</button>
    <button onclick="deleteData()">点我删除一个数据</button>
    <button onclick="deleteAllData()">点我清除所有数据</button>

<script type="text/javascript">
    let p = {name:'张三',age:18}

    function saveData() {
        sessionStorage.setItem('msg1','hello')
        sessionStorage.setItem('msg2',9527)
        sessionStorage.setItem('person',JSON.stringify(p))
    }

    function readData() {
        console.log(sessionStorage.getItem('msg1'))
        console.log(sessionStorage.getItem('msg2'))
        let person = sessionStorage.getItem('person');
        console.log(JSON.parse(person))
    }

    function deleteData() {
        sessionStorage.removeItem('msg1')
    }

    function deleteAllData(){
        sessionStorage.clear()
    }

</script>
</body>
</html>